3+y+z=3 2x+y+z=16 x+y+2z=9 x=... y=... z=...

RALAT SOAL!!
x + 2y + z = 3 (i)
2x + y + z = 16 (ii)
x + y + 2z = 9 (iii)

Eliminasi ii dan i
2x + y + z = 16
x + 2y + z = 3
------------------- (-)
x - y = 13 (iv)

Eliminasi ii dan iii
2x + y + z = 16 |x 2|
x + y + 2z = 9

4x + 2y + 2z = 32
x + y + 2z = 9
----------------------- (-)
3x + y = 23 (v)

Eliminasi v dan iv
3x + y = 23
x - y = 13
----------------- (+)
4x = 36
x = 9

x - y = 13
9 - y = 13
y = -4

x + 2y + z = 3
9 + 2(-4) + z = 3
z = 3 -1
z= 2

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